4 doctors weighed in

Specific gene mutations play a role and genes changed due to environmental exposure may be causal.

Having a close relative who has it increases your risk.
The triggers are felt to be virus or toxins (herbicides or pesticides).
Changes in the brain of parkinson patients include: lower dopamine, lower norepinephrine, and the presence of lewy bodies.

In brief:
Parkinson's causes

Specific gene mutations play a role and genes changed due to environmental exposure may be causal.

Having a close relative who has it increases your risk.
The triggers are felt to be virus or toxins (herbicides or pesticides).
Changes in the brain of parkinson patients include: lower dopamine, lower norepinephrine, and the presence of lewy bodies.
Would you like to video or text chat with me?